If your dog is having a stroke then sometimes the aspirin can help stop the stroke and may even help reduce future strokes.
But if your dog is having a stroke you may need to call an emergency vet and have them come out to treat the dog.
In some places they have emergency vets that are open 24 hours per day and some even come out to your house at an extra charge.
The vets can also give you advice over the phone for the dogs stroke and other health issues.
If possible bring the dog into the vet and they can treat the dog when they have a stroke.
Your dog can also be prescribed blood thinners and other medications to help reduce the chance of another stroke.
But giving the dog an aspirin can help sometimes with a stroke and giving your dog an aspirin every once in awhile can help reduce a stroke and heart attack in a dog.
Just don't overdose the dog on aspirin as they can be easily overdosed.